Mount Semeru Erupts Again Early This Morning (Monday, November 10, 2025)

Mount Semeru in East Java erupted again on Monday (10/11/2025) at 04:36 AM WIB. In the last week, Mount Semeru only erupted once.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the observed ash column height reached 800 meters above the peak (4,476 meters above sea level).

The ash column was observed to be white to grey with thick intensity towards the northeast. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 131 seconds.

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According to the MAGMA Indonesia volcano activity report, the activity level of Mount Semeru is at Level II (Alert). Seismicity observations on November 10, 2025, at 00:00-23:59 WIB showed 135 eruption tremors with amplitudes of 10-23 millimeters and a duration of 54-156 seconds.

Then, 13 avalanche tremors with amplitudes of 2-8 mm and a duration of 37-100 seconds, and 8 exhalation tremors with amplitudes of 2-8 millimeters and a duration of 41-55 seconds occurred.

PVMBG advises against any activity in the southeast sector along Besuk Kobokan, as far as 8 kilometers from the peak (eruption center). Beyond that distance, the public should not engage in activities within 500 meters from the riverbank (river border) along Besuk Kobokan, as there is a potential for expansion of hot clouds and lava flows up to 13 kilometers from the peak.

Throughout 2025, MAGMA Indonesia has recorded 6,919 volcano eruptions across Indonesia. Mount Semeru in East Java erupted the most with 2,779 times.

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